THE USE OF SHEEP AS A MODEL TO PREDICT THE RELATIVE INTAKES OF SILAGES BY DAIRY-CATTLE

被引：12

作者：

CUSHNAHAN, A ^{[1
]}

GORDON, FJ ^{[1
]}

FERRIS, CPW ^{[1
]}

CHESTNUTT, DMB ^{[1
]}

MAYNE, CS ^{[1
]}

机构：

[1] QUEENS UNIV BELFAST,BELFAST,ANTRIM,NORTH IRELAND

来源：

ANIMAL PRODUCTION | 1994年 / 59卷

关键词：

COWS; FOOD INTAKE; SHEEP; SILAGE;

D O I：

10.1017/S0003356100007935

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

A study was carried our to determine if sheep could be used as a model for predicting the intakes of silages by cattle. Fifty ewes and 45 cows were offered five grass silages unsupplemented in two parallel randomized-block experiments over a 4-week period. Each silage had been made using the same equipment over a range of cutting dates (May July, August 1991). The silages differed in fermentation characteristics, with lactic acid concentrations varying from 15.3 to 90.7 8/kg dry matter, and ammonin-nitrogen concentrations from 77 to 198 g/kg nitrogen. When expressed on a metabolic live-weight basis, the mean intakes of silages silages by cows were 2.25 times those of the sheep, with the mean intakes being 35.1 and 79.1 g/kg M(0.75) for the sheep and cows respectively. However, there was no significant correlation between recorded intakes during the 4th week of the study by the two species (y (cows) = 0.62x (sheep) + 58.40; r(2) = 0.03). It was concluded that sheep were not a useful model system to predict the intakes of a range of grass silages of similar chop length by dairy cows.

引用

页码：415 / 420

页数：6